Building or casting of steel-concrete ships.



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l TED STATES BUILDING- OR CASTING 0F STEEL-CON' CRETE SHIPS.

meneer.

Specication oi Letters Patent.

Patented Pelo.. i8, i919..

Application filed September 30, 1918. Serial No. 256,219.

To all whom t may concern:

Be it known that I, NIcoLAv KNUnrzoN FOUGNER, of Kongens gate 6,Christiania, in the Kingdom of Norway, have invented certain new anduseful improvements in Build ing or Casting of Steel-Concrete Ships; andl do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others` skilled intheart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form a part of this specification.

The present invention relates to the build ing or casting of steelconcrete ships or more particularly the walls of middle-sized ships,that the ships varying1 in size from 15G-7 50 tons. Ships of this sizegenerally have walls which are too thin to permit their being castbetween ordinary double lathings consisting of wood 'or metal lath.

According to the present invention the walls of the ship are castbetween an outer lathin of metal netting or the like and an inner athingconsisting of horizontal boards and planks guiding in vertical slots inthe frame. Hereby it 1s obtained that the lathing boards may be insertedrapidly during the casting operation, so that the casting may always beeEectively controlled from above.

The necessary horizontal and vertical reinforcements are arrangedbeforehand in the space between metal netting and wood lathing and afterthe casting operation has been performed the exterior metal netting orlath is provided Vwith a coat of plaster on the outside in the ordinarymanner.

0n the drawing is diagrammatically illustrated a form of the invention.

ligure l is a cross section of the wall of a steel concrete vessel andFig. 2 is a section of the ship wall on the line ll--lll of Fig.. l.

The exterior lathing forms a permanent part of the ship andv is formedin the ordi- @cpict of this patent may be obtained for :live cents each,by addressing the nary manner by the metal lath 1, which is mounted onthe several reinforcement irons 2 and frame 3. The inner lathing isformed by horizontal boards Il, which are placed on top of each other inthe manner of stop logs in the vertical guides 5 in the frame 3. Saidguides 5 of course may also consist of ribs or irons fastened on theframe 3.

During the casting operation boards 4 are put in plnace in the guides 5,`so that the level of the grout is always a little below the topmostboard 4. The control of the casting may thus take place from above onthe inside as well as through the metal lath from the outside. After thecasting operation is completed, the boards forming the inner lathing,are removed.

laims:

1. In the manufacture of middle-sized steel concrete ships and the likecasting the ships walls between an exterior lathing of metal lath or thelike which forms a permanent part of the construction, and an innerlathing of horizontal boards placed one upon the other as the castingprogresses and adapted to be removed after the casting operation.

2. The method herein described of manufacturing steel concrete ships,consisting in constructing a permanent outer metal lathing of the heightof the wall of the ship and an inner lathing of removable boards to beputin place as the casting progresses to form a space therebetween of awidth approximately equal to the thickness of the wall of the ship,filling the space between the lathings with concrete, removing the innerlathing, and applying a coating of plaster to the outer lathing.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

NIGLAY KNUDTZON FOUGNER.

Witnesses:

C. NORMAN, C. FABRrorUs HANsnN.

Gommissioner or retentir,

Washington, D. 0.,

